8491973603 has 4 divisors (see below), whose sum is σ = 8991501480. Its totient is φ = 7992445728.

The previous prime is 8491973593. The next prime is 8491973621. The reversal of 8491973603 is 3063791948.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8491973603 - 2¹⁶ = 8491908067 is a prime.

It is a super-2 number, since 2×8491973603² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8491973653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249763913 + ... + 249763946.

It is an arithmetic number, because the mean of its divisors is an integer number (2247875370).

Almost surely, 2^8491973603 is an apocalyptic number.

8491973603 is a deficient number, since it is larger than the sum of its proper divisors (499527877).

8491973603 is a wasteful number, since it uses less digits than its factorization.

8491973603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499527876.

The product of its (nonzero) digits is 979776, while the sum is 50.

The square root of 8491973603 is about 92151.9050427065. The cubic root of 8491973603 is about 2040.1849764185.

The spelling of 8491973603 in words is "eight billion, four hundred ninety-one million, nine hundred seventy-three thousand, six hundred three".